As if toxic waste from chemical manufacturing and other industrial processes weren’t enough, scientists say some streams are also being fouled by remnants of amphetamines — in some cases at high enough levels to alter the base of aquatic food chain.
A new study, published in the journal Environmental Science & Technology, traced the presence of illicit drugs at six stream sites around Baltimore, focusing on the Gwynns Falls watershed, which is part of the Baltimore Ecosystem Study Long-Term Ecological Research program. Two rural streams were also sampled in the Oregon Ridge watershed, the closest forested region. Continue reading “Study tracks amphetamine pollution in Baltimore streams”→
New study suggests climate is very sensitive to greenhouse gases
Although the rate of global warming has increased dramatically in the last few decades, a new study suggests that human activities have been driving climate change for the past 180 years. The findings suggest that global warming is not just a 20th century phenomenon, and that the climate system is, indeed, quite sensitive to the buildup of heat-trapping pollution.
The study was led by Nerilie Abram, of The Australian National University, who warming began during the early stages of the Industrial Revolution and started leaving a fingerprint in the Arctic and tropical oceans around the 1830s, much earlier than scientists had expected. Continue reading “Global warming started earlier than you think”→
Disease may be exacerbated by warm water, low stream flows
The Yellowstone River, part of Montana’s iconic western landscape, is once again beset by environmental woes, as a rapidly spreading fish kill has spurred state resource managers to close the river to all recreational uses, including fishing, boating and tubing. Biologists with Montana Fish, Wildlife and Parks said they’ve counted more than 2,000 dead mountain whitefish, and the estimate the total mortality in the tens of thousands. The river was also hammered by an oilspill in 2011 after pipeline burst. Continue reading “Environment: Massive fish kill reported in Yellowstone River”→
The study, published in the journal Nature Communications, analyzed changes in the population of 62 wild bee species, comparing them with patters of oilseed rape crops between 1994 and 2011, as the use of commercial use of neonicotinoids became widespread.
The findings suggest that systemic pesticides contributed to a “large-scale and long-term decline” in wild bee species distributions and communities. Species that regularly forage on treated rape fields declined, on average, three times as much as species that feed on a wider variety of plants, showing that oilseed rape is a principle mechanism of neonicotinoid exposure among wild bee communities. Continue reading “Neonicotinoid pesticides implicated in decline of wild bees across the UK”→
Under-reporting of catches documented by nonprofit research group
The marine environment around some Caribbean islands is still threatened by unsustainable fishing, according to a new study that documents the under-reporting of catches in the Turks and Caicos Islands. According to the research, catches on the islands were 86 percent higher than what was reported to the UN’s Food and Agriculture Organization, a finding with troubling implication for sustainable fisheries efforts.
Are humans responsible for the big jump to the West Coast?
Genetic analysis shows that the bat-killing fungus recently detected for the first time in western North America is similar to strains found in the eastern United States. That means there is a good chance that humans were involved in spreading the disease, according to conservation advocates who want resource managers to step up efforts to halt the spread of the fungus by restricting cave tourism.
The new study, published in the journal mSphere, has implications for resource managers battling the spread of a disease that has wiped out millions of bats in North America. It provides new clues about the origin of this strain of the Pseudogymnoascus destructans fungus, or Pd. The latest case of WNS near North Bend, Washington was about 1,300 miles from the previous westernmost detection in Nebraska. Continue reading “Genetic study tracks westward spread of bat-killing disease”→
Researchers call for balance between mining and ecosystem protection
New research shows that proposed mining on the seafloor of the Pacific Ocean would likely have a huge impact on marine biodiversity. A study published in the journal Scientific Reports, documents an “impressive abundance and diversity among the creatures” on the seafloor in the Clarion-Clipperton Zone — an area in the equatorial Pacific Ocean being targeted for deep-sea mining.
“We found that this exploration claim area harbors one of the most diverse communities of megafauna (animals over 2 cm in size) to be recorded at abyssal depths in the deep sea,” lead author Diva Amon said in a press release.
The researchers explained that a combination of biological, chemical and geological processes formed a high concentrations of polymetallic “manganese” nodules on the deep seafloor in the CCZ–an area nearly the size of the contiguous United States. These nodules are potentially valuable sources of copper, nickel, cobalt and manganese, among other metals, which has led to an interest in mining this region. Continue reading “New study documents biodiversity in proposed deep sea mining zone”→